白云鄂博多金属矿含铁矿物嵌布特性研究  

Study on Dissemination Characteristics of Fe-bearing Minerals in Bayan Obo Polymetallic Ore

作　　者：马宏伟 孙永升[1,2] 祝昕冉 高鹏 李文博[1,2] MA Hongwei;SUN Yongsheng;ZHU Xinran;GAO Peng;LI Wenbo(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,沈阳110819 [2]难采选铁矿高效开发利用技术国家地方联合工程研究中心,沈阳110819

出　　处：《有色金属（选矿部分）》2024年第5期46-54,共9页Nonferrous Metals（Mineral Processing Section）

基　　金：国家重点研发计划项目(2021YFC2901000);国家自然科学基金资助项目(52130406)。

摘　　要：白云鄂博多金属矿是我国复杂难选铁矿资源之一,近年来对多金属矿进行技术攻关,但铁资源利用率较低。为了解矿石性质的变化,采用化学分析、矿物参数自动定量分析系统、偏光显微镜、扫描电子显微镜等方法及设备对多金属矿中铁矿物进行嵌布特性研究。结果表明,多金属矿中TFe含量为31.55%,主要含铁矿物为磁铁矿、赤铁矿、褐铁矿、黄铁矿(磁黄铁矿)、菱铁矿,其中磁铁矿含量占9.467%,赤铁矿含量占31.280%。矿石中铁矿物以磁性铁和赤褐铁两种铁物相为主,磁性率为49.15%,为混合铁矿石类型。矿石中磁铁矿多与脉石相互交织形成网状嵌布,且夹杂少量黄铁矿,而赤铁矿多以斑状、粒状、浸染状、鳞片状集合体嵌布,两者中存在微细粒包裹体结构。铁矿物粒度不均,-0.040mm粒级约占55%,且磁铁矿、赤铁矿与28种矿物嵌连,主要是萤石、赤铁矿、磁铁矿、稀土、石英、重晶石、方解石、铁白云石。在-0.074mm占60%的磨矿细度条件下,铁矿物解离度达82.78%,但微细粒铁矿物包裹体与脉石、微细粒脉石矿物包裹体与铁矿物均解离困难,阶段磨矿及充分细磨是铁矿物高效回收的关键。Bayan Obe polymetallic ore is one of the complex and difficult-to-process iron ore resources in China.In recent years,the key technology of which has been studied,but the utilization rate of iron resources is low.In order to understand the change of ore properties,the dissemination characteristics of iron minerals are in this polymetallic ore was studied by chemical analysis,the mineral liberation analyzer system,polarized microscope and scanning electron microscope.The results clre show that the content of Fe in the polymetallic ore is 31.55%,and the main Fe-bearing minerals are magnetite,hematite,limonite,pyrite(pyrrhotite)and siderite,and the content of magnetite is 9.467%and the content of hematite is 31.280%.The iron minerals are mainly magnetic iron and hematite-limonite phases,and the polymetallic ore magnetic susceptibility is 49.15%,which is a mixed iron ore type.In the polymetallic ore,magnetite is often embedded in gangues with interlaced net structure,and a small amount of pyrite is included,while hematite appears in the forms of with porphyritic,granular,disseminated and scaly aggregates.In addition,there are micro-inclusion structures in both.The grains of the iron minerals are 55%-40μm,and the magnetite and hematite are closely associated with fluorite hematite,magnetite,rare earth minerals,quartz,barite,calcite,iron dolomite,et al.At the grinding fineness of 60%-74μm,the iron ore liberation degree reaches 82.78%,but it is difficult to dissociate micro-fine iron minerals inclusions from gangue and micro-fine gangue inclusions from iron minerals.Therefore,stage grinding and fine grinding is the key to efficient recovery of the iron minerals.

关 键 词：白云鄂博多金属矿 铁矿物 嵌布特征 连生关系 

分 类 号：TD951[矿业工程—选矿] TD912